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cmd/thanos/rule.go: simplify deduplication #1965

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Jan 8, 2020
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cmd/thanos/rule.go: simplify deduplication #1965

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8 changes: 3 additions & 5 deletions cmd/thanos/rule.go
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Original file line number Diff line number Diff line change
Expand Up @@ -704,18 +704,16 @@ func labelsTSDBToProm(lset labels.Labels) (res labels.Labels) {

func removeDuplicateQueryAddrs(logger log.Logger, duplicatedQueriers prometheus.Counter, addrs []string) []string {
set := make(map[string]struct{})
deduplicated := make([]string, 0, len(addrs))
for _, addr := range addrs {
if _, ok := set[addr]; ok {
level.Warn(logger).Log("msg", "duplicate query address is provided - %v", addr)
duplicatedQueriers.Inc()
continue
}
deduplicated = append(deduplicated, addr)
set[addr] = struct{}{}
}

deduplicated := make([]string, 0, len(set))
for key := range set {
deduplicated = append(deduplicated, key)
}
return deduplicated
}

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